For your viewing pleasure - 75 shot datalog

[Hal]

http://206.124.12.138/dsmlink.jpg

[Van]

Very nice Hal.

I see that there is a "knckret" color and yet no line on the log for it.
I have a few questions for you, if you don't mind...

Are you really that rich? What is your timing advance at 7k rpm and the 23 psi? My car seems faster with some knock.

On the graph, it seems that the O2 voltage dips way down right after the shot. Is that right? If so, why?

It appears as though your airflow is kind of breaking up right about 5800-6k rpm or so. Not the big spikes like when you see maf overrun, but just some small oscillations. What are you using for your intake? A 2G mas or vpc? Is this the intake airflow norm for your logs with your set-up?

Love that HP line! How does the dsmlink figure that?

Sorry so many questions Hal, hehe. :)

[john]

Very nice, Hal. Very nice. We need to make a trip down to visit Louie...

[Hal]

No line... cuz there is no knock.

I don't why it dips... it's well after the point where the shot comes on.

The air flow is probably choppy because of lack of a lower h/c in the MAS.

Hp is calc'd using a acceleration over time (uses weight, gearing, tire size).

Hal

[Van]

So then you tune for no knock?
Or have you just gotten the dsmlink in the ballpark of where you want it?

My O2 started the dip thing when it went bad. It would work fine except at wot.

Ahhh, you have the lower hc out of your 2G mas too. ;)

I was gonna ask if you were happy with what timing advance you are seeing. But the dsmlink lets you set that right? What are you setting for timing at wot?

[Hal]

Actually... I tune for a ball park 11:1 afr

I'll get closer with the wideband in the car :)

Timing set to stock... nice & safe for boost & n20... 14 degrees :)

Hal

[john]

Hal - can the DSMlink use input from the WBO2 sensor and auto-adjust the AFR?

I think that the AEM ECU has that capability, ie, tell it "I want 11.8:1 at WOT above 4500 RPM" and it'll do the magic.

Someday, someday....

[DlandryTSI]

I wish TMO would show you HP...... :mad:

--Dave

[XakEp]

O

M

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[Hal]

Originally posted by john
Hal - can the DSMlink use input from the WBO2 sensor and auto-adjust the AFR?

I think that the AEM ECU has that capability, ie, tell it "I want 11.8:1 at WOT above 4500 RPM" and it'll do the magic.

Someday, someday....

It can log the w/b o2 and show the afr... I have a routine to calc the adjustments to meet the target, and after a run it can upload the new maps.

But it can't adjust on the fly.

Hal

[Van]

Originally posted by XakEp
O

M

G

You valley girl. :p Oh wait, this ain't shit talkers, hehe.

[Van]

Originally posted by Hal
Actually... I tune for a ball park 11:1 afr

I'll get closer with the wideband in the car :)

Timing set to stock... nice & safe for boost & n20... 14 degrees :)

Hal

Very nice, but I've heard that dsm's like 12-12.5:1 better. Have you tried that ratio? If so, what did you think of it and did you have any knock?

[Hal]

No... I didn't try any leaner.

So far... I'm pretty pleased with the setup.

I'll do some tuning with the wideband this week and I'll see what appears to work best.


Hal

[Van]

Cool, cool.

Good luck too.

[XakEp]

Originally posted by Van


You valley girl. :p Oh wait, this ain't shit talkers, hehe.

lol... (shaking head side to side to each word....) I dont know...

[Van]

hehe

[Hal]

An update on the chart.

1) The o2v drop out does occur when the N2o comes on.

It is apparently caused by the n2o getting into the system before the fuel does (n2o @ 1000 psi, fuel @ 40 psi). The event only lasts .3 seconds and is not uncommon.

2) The boost reading is incorrect. The P/C application doesn't take actual barometric pressure into account. Corrected, it's actually 27 psi. I've modded the P/C app to fix that, and the Palm app has been "fixed" for a long time.

So... yes... I'm running what most people would consider to be "big boost" and a good size shot.

I know this isn't a real dyno plot, but it does give me some results to compare against.

The DSMLink (zeroed out), on a very cold day showed about 404 hp.

After setting the fuel, adding N2o, and the venom intake, it shows 550.

I'll take that simply as proof that it's making more power... I plan on hitting the AWD dyno after the IDRC race. It will be VERY interesting to compare the results.

Hal

[Jason]

Looks GREAT Hal....

Now you gotta give me ride in that thing!

Let us know when you make it up to the Dyno, as it's only a few blocks from my house. I'd love to see it go.....